Impact of non-programmable distributed generation in an islanded microgrid: the case study of Ustica

The paper presents a systematic analysis of non-programmable distributed generation impact in an islanded microgrid. Different issues have been analyzed, with a special focus on the most significant ones in a small islanded network. To this aim, the case study of Ustica island was considered. A digital twin of the MV network was developed starting from the network topology data and the power measurement acquired in each secondary substation. Simulations were then performed in the hypothesis of a large increment of distributed generation installation into the network. A discussion is then reported on which are the main technical issues to be faced in the considered case study.